Troubleshooting guide

61186003L1-1D 7-101
DLP-725
Verifying Intershelf Communication
INTRODUCTION
This procedure provides step-by-step instructions to verify the host System Controller Unit
(SCU) can properly communicate with all client SCUs connected on the RS-485 bus. This
procedure must be performed if two or more MX2820 shelves are connected together via the
RS-485 bus.
PREREQUISITE PROCEDURES
Before starting this procedure, all installation tasks in DLP-712 should be completed. For
intershelf communication, the Target ID (TID) and shelf number for each SCU must be
properly configured and, the RS-485 interface must be enabled for each SCU (shelf). One SCU
must be configured for Host mode while all other SCUs must be configured in Client mode.
MATERIALS REQUIRED
• VT100 terminal or PC with VT100 terminal emulation software
WARNING
To prevent electrical shock, do not install equipment in a wet loca-
tion or during a lightning storm.
CAUTION
Electronic modules can be damaged by static electrical discharge.
Before handling modules, wear an antistatic discharge wrist strap
to prevent damage to electronic components. Place modules in
antistatic packing material when transporting or storing. When
working on modules, always place them on an approved antistatic
mat that is electrically grounded.